Two of the photos show the couple in a warm embrace while the third is a close-up of them kissing. Only one photo was shared with a simple caption: "10 years later ....."

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Cyrus and Hemsworth first met on the set of "The Last Song" in 2009 and announced their engagement in 2012 before a few years of on-again-off-again relationship rumors swirled. She began wearing her engagement ring again in early 2016, and the couple has been together since.

Fans began speculating the pair had tied the knot on Monday after pal Conrad Carr posted photos and videos to his Instagram story that showed Cyrus in a white dress, cutting a cake alongside her movie star man. In Carr's post, Cyrus and Hemsworth were surrounded by family and friends.

A video clip shows the three Hemsworth brothers, Liam, Chris and Luke, taking a shot together with balloons that read "Mr. and Mrs." in the background. A photo also shows Cyrus's mom, Trish, looking casual in light jeans and a black top.

USA TODAY reached out to representatives for Cyrus and Hemsworth for comment after Monday's post.

Sara M Moniuszko and Hannah Yasharoff contributed to this report. Reach Mariah Timms at mtimms@tennessean.com or 615-259-8344 and on Twitter @MariahTimms.